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BS 450 - 1958

Cross Recessed 90° Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2]

BS 450 - 1958 英制十字槽沉头螺钉 - B.S.W. & B.S.F. 螺纹 [Table 2]

See all versions and complete specifications: Cross Recessed 90° Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2] — Full Specification Page

Dimensional Specifications — BS 450 - 1958 (mm)

Size	P	r	k_max	k_min	s_max	s_min	ds_max	ds_min	k_nominal	ds_nominal
1/4	0.4375	0.227	0.729	0.197	14	18	0.386	0.245	0.766	4
1/8	0.1875	0.088	0.307	0.084	24	32	0.166	0.106	0.328	2
3/16	0.3125	0.150

Related Standards

GB /T 819.1 - 2016— Countersunk Flat Head Screws (Common Head Style) with Cross Recess - Part 1: Property Class 4.8 GB /T 819.2 - 2016— Countersunk Flat Head Screws with Cross Recess - Part 2: Property Class 8.8, Stainless Steel Screws and Non-ferrous Metal Screws GB /T 819.1 - 2000— Countersunk Flat Head Screws (Common Head Style) with Cross Recess - Part 1: Property Class 4.8 GB /T 819.2 - 1997— Cross Recessed Countersunk Flat Head Screws (Common Head Style) - Grade A - Part 2: Steel of Property Class 8.8, Stainless and Non-Ferrous Metals GB /T 13806.1 (B) - 1992— Cross Recessed Countersunk Screws for Fine Mechanics GB 819 - 1985— Cross Recessed Countersunk Head Screws GB 819 - 1976— Cross Recessed Countersunk Head Screws

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